379 
SHORT NOTES. 
Amprosia tairipa L.—I send you specimens of Ambrosia trifida, 
which we have found on a railway-bank near Ramsgate this 
m 
patch near Margate, among a lot of Chen nopods, which it super- 
ficially resembles. This plant, when I saw it last year, was fully 
grown, about 34 or 4 my ey and much branched. The plant, 
when first seen in June, bore only the male inflorescence at the 
ends of the Sacekos! ; "shortly after the female flowers rane 
It is not to be found this year in the Margate locality. At the e 
of two or three weeks, when the female flowers were fully deve alba, 
the male catkins fell off and bar i and the green pistillate 
flowers alone were to be seen. So t the plant when first ex- 
" amined appeared to bear male catkins par and at a later stage only 
female flowers could be found, and it might easily be mistaken for 
a dicecious male or bait plant, according to the stage of develop- 
ment at which it might be Mapnaery itt ern M. Pirrock. 
[This Ambrosia seems to be of frequent occurrence this year 
we have received it from Stoaylinirat Lancashire, and have foal 
of it as growing at ‘Suatiniors —Eb. Journ. Bor.] 
‘A Nore on Hysris.”—Dr. Gilbert's paper (pp. ae 
with much of which I agree, shows how easily conciseness of e 
pression leads to misunderstanding. I have raised no Lene anton ; 
in his recent work on brambles Dr. Krause has practically 
the variableness of the German forms to hybridity ian "The 
case of Primu/a elatior, &c., is, I must insist, not strictly parallel 
to that of the Tunbridge Wells common Rubi: on the one hand 
extent indeterminate. The seeds of Primula oe mt usually con- 
veyed by birds from place blasts those of & , I believe, 
“varieties,” and even “species,” may have had a hybrid origin ; 
but it is dangerous to assume this too readily. My experience is 
totally sterile, are markedly so, c compared with their parents. 
case of their extension by ponte at the tips, this greater sterility 
may gradually disappear; but I am not aware of any proof that 
such is the case. At Ham Ponds, E. Kent, there is a seprealers 
space covered with R. cesius x Ideus, yet a root brought thence 
produced no more than an odd drupelet or so during several 
seasons’ cultivation.—Epwarp 8. 
GEASTER FORNICATUS IN Berks. _—As this curious fungus is rare, 
it may be worth while putting on record its occurrence near Arding- 
